136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QPAINTENGINE_P_H
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#define QPAINTENGINE_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of other Qt classes. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "QtGui/qpainter.h"
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#include "QtGui/qpaintengine.h"
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#include "QtGui/qregion.h"
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#include "private/qobject_p.h"
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QT_BEGIN_NAMESPACE
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class QPaintDevice;
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class Q_GUI_EXPORT QPaintEnginePrivate
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{
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Q_DECLARE_PUBLIC(QPaintEngine)
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public:
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QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipDevice(0), hasSystemTransform(0),
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hasSystemViewport(0) {}
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virtual ~QPaintEnginePrivate() { }
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QPaintDevice *pdev;
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QPaintEngine *q_ptr;
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QRegion systemClip;
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QRect systemRect;
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QRegion systemViewport;
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QTransform systemTransform;
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QPaintDevice *currentClipDevice;
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uint hasSystemTransform : 1;
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uint hasSystemViewport : 1;
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inline void transformSystemClip()
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{
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if (systemClip.isEmpty())
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return;
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if (hasSystemTransform) {
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if (systemTransform.type() <= QTransform::TxTranslate)
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systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy()));
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else {
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// Transform the system clip region back from device pixels to device-independent pixels before
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// applying systemTransform, which already has transform from device-independent pixels to device pixels
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#ifdef Q_OS_MAC
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QTransform scaleTransform;
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const qreal invDevicePixelRatio = 1. / pdev->devicePixelRatio();
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scaleTransform.scale(invDevicePixelRatio, invDevicePixelRatio);
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systemClip = systemTransform.map(scaleTransform.map(systemClip));
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#else
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systemClip = systemTransform.map(systemClip);
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#endif
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}
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}
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// Make sure we're inside the viewport.
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if (hasSystemViewport) {
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systemClip &= systemViewport;
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if (systemClip.isEmpty()) {
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// We don't want to paint without system clip, so set it to 1 pixel :)
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systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1));
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}
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}
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}
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inline void setSystemTransform(const QTransform &xform)
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{
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systemTransform = xform;
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if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport)
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transformSystemClip();
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systemStateChanged();
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}
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inline void setSystemViewport(const QRegion ®ion)
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{
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systemViewport = region;
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hasSystemViewport = !systemViewport.isEmpty();
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}
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virtual void systemStateChanged() { }
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void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti);
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};
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QT_END_NAMESPACE
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#endif // QPAINTENGINE_P_H
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